Class UnusedVariableRemoval
- java.lang.Object
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- org.apache.sling.scripting.sightly.impl.compiler.visitor.UniformVisitor
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- org.apache.sling.scripting.sightly.impl.compiler.visitor.TrackingVisitor<org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity>
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- org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval
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- All Implemented Interfaces:
CommandVisitor
,EmitterVisitor
public final class UnusedVariableRemoval extends TrackingVisitor<org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity> implements EmitterVisitor
This optimization removes variables which are bound but never used in the command stream.
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Field Summary
Fields Modifier and Type Field Description static StreamTransformer
TRANSFORMER
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Fields inherited from class org.apache.sling.scripting.sightly.impl.compiler.visitor.TrackingVisitor
tracker
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity
assignDefault(Command command)
PushStream
getOutputStream()
Get the output streamprotected void
onCommand(Command command)
void
visit(VariableBinding.End variableBindingEnd)
Process aVariableBinding.End
command.void
visit(VariableBinding.Start variableBindingStart)
Process aVariableBinding.Start
command.-
Methods inherited from class org.apache.sling.scripting.sightly.impl.compiler.visitor.TrackingVisitor
visit, visit
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Methods inherited from class org.apache.sling.scripting.sightly.impl.compiler.visitor.UniformVisitor
visit, visit, visit, visit, visit, visit, visit, visit
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Field Detail
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TRANSFORMER
public static final StreamTransformer TRANSFORMER
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Method Detail
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getOutputStream
public PushStream getOutputStream()
Description copied from interface:EmitterVisitor
Get the output stream- Specified by:
getOutputStream
in interfaceEmitterVisitor
- Returns:
- the output stream of this visitor
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visit
public void visit(VariableBinding.Start variableBindingStart)
Description copied from interface:CommandVisitor
Process aVariableBinding.Start
command.- Specified by:
visit
in interfaceCommandVisitor
- Overrides:
visit
in classTrackingVisitor<org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity>
- Parameters:
variableBindingStart
- the command
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visit
public void visit(VariableBinding.End variableBindingEnd)
Description copied from interface:CommandVisitor
Process aVariableBinding.End
command.- Specified by:
visit
in interfaceCommandVisitor
- Overrides:
visit
in classTrackingVisitor<org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity>
- Parameters:
variableBindingEnd
- the command
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assignDefault
protected org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity assignDefault(Command command)
- Specified by:
assignDefault
in classTrackingVisitor<org.apache.sling.scripting.sightly.impl.compiler.optimization.UnusedVariableRemoval.VariableActivity>
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onCommand
protected void onCommand(Command command)
- Specified by:
onCommand
in classUniformVisitor
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